// [The "BSD licence"]
// Copyright (c) 2006-2007 Kay Roepke
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
// 1. Redistributions of source code must retain the above copyright
//    notice, this list of conditions and the following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright
//    notice, this list of conditions and the following disclaimer in the
//    documentation and/or other materials provided with the distribution.
// 3. The name of the author may not be used to endorse or promote products
//    derived from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
// IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
// OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
// IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
// NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
// THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

#import <Cocoa/Cocoa.h>
#import <ANTLR/ANTLRCommonTree.h>

@interface ANTLRUnbufferedCommonTreeNodeStreamState : NSObject {
	ANTLRCommonTree *currentNode;
	ANTLRCommonTree *previousNode;

	int currentChildIndex;
	int absoluteNodeIndex;
	unsigned int nodeStackSize;
	unsigned int indexStackSize;
	
	NSMutableArray *lookahead;
}

- (ANTLRCommonTree *) currentNode;
- (void) setCurrentNode: (ANTLRCommonTree *) aCurrentNode;

- (ANTLRCommonTree *) previousNode;
- (void) setPreviousNode: (ANTLRCommonTree *) aPreviousNode;

- (int) currentChildIndex;
- (void) setCurrentChildIndex: (int) aCurrentChildIndex;

- (int) absoluteNodeIndex;
- (void) setAbsoluteNodeIndex: (int) anAbsoluteNodeIndex;

- (unsigned int) nodeStackSize;
- (void) setNodeStackSize: (unsigned int) aNodeStackSize;

- (unsigned int) indexStackSize;
- (void) setIndexStackSize: (unsigned int) anIndexStackSize;

- (NSMutableArray *) lookahead;
- (void) setLookahead: (NSMutableArray *) aLookahead;

- (void) addToLookahead: (id)lookaheadObject;
- (void) removeFromLookahead: (id)lookaheadObject;

@end
